156618365081 has 2 divisors, whose sum is σ = 156618365082. Its totient is φ = 156618365080.

The previous prime is 156618365077. The next prime is 156618365147. The reversal of 156618365081 is 180563816651.

156618365081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135362183056 + 21256182025 = 367916^2 + 145795^2 .

It is a cyclic number.

It is not a de Polignac number, because 156618365081 - 2² = 156618365077 is a prime.

It is a super-2 number, since 2×156618365081² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (156618365581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78309182540 + 78309182541.

It is an arithmetic number, because the mean of its divisors is an integer number (78309182541).

Almost surely, 2^156618365081 is an apocalyptic number.

It is an amenable number.

156618365081 is a deficient number, since it is larger than the sum of its proper divisors (1).

156618365081 is an equidigital number, since it uses as much as digits as its factorization.

156618365081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1036800, while the sum is 50.

The spelling of 156618365081 in words is "one hundred fifty-six billion, six hundred eighteen million, three hundred sixty-five thousand, eighty-one".